# Stage 1: Install dependencies and build
FROM node:20-alpine AS builder
WORKDIR /app

# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
RUN apk add --no-cache libc6-compat

COPY package*.json ./
RUN npm ci

COPY . .

# Disable Next.js telemetry during build
ENV NEXT_TELEMETRY_DISABLED=1

RUN npm run build

# Stage 2: Runner stage
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy build artifacts and assets
COPY --from=builder /app/public ./public

# Set correct permission for prerender cache
RUN mkdir .next
RUN chown nextjs:nodejs .next

# Automatically leverage output traces to reduce image size
# https://nextjs.org/docs/advanced-features/output-file-tracing
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT=3000
# set hostname to localhost or 0.0.0.0 for docker
ENV HOSTNAME="0.0.0.0"

# server.js is created by next build from the standalone output
CMD ["node", "server.js"]